The aim of this work was design of alternative solution of milling head housing with help of topology optimization. Mechanical properties of new alternative housing solution (specifically a stiffness) are based on the existing milling head IFVW10x manufactured by the ŠMT a.s. company. The stiffness of existing milling head was determined using KISSsys calculation software, as well as the stiffness of the milling head with the alternative housing solution. The special "Guayan reduction" tool (Siemens NX software) was used to obtain the partial stiffness of the housing and to determine its influence on the stiffness of the whole assembly.

This work aims to determine the main dynamic properties of a cast ram in order to create correct modal numerical simulation in FEM software. The dynamic stability of machine tools is directly dependent on natural frequencies and their waveforms and it has large impact on the accuracy of machine tools during the cutting process. Therefore, determining main dynamic properties (vibrationsnatural frequencies and their waveforms) is very important. The numerical simulation was done in Siemens Simcenter software with NX Nastran solver. Simulation was carried out as a free state solution. Experimental measurement was done to verify the calculated data. Experimental measurement was performed using the impulse excitation method with a modal sledge hammer. As well as the modal sledge hammer, we used a triaxial accelerometer and a generator module. Subsequently, the experimental modal analysis was done in PULSE19 software. Comparison of results was performed after measuring. Certain agreement was found between the experimentally measured data and data form numerical simulation.

The paper deals with optimizing of the headstock of the lathe part of the heavy duty CNC machining centre for 70 ton workpieces using topology optimization. The aim was to find a solution that minimizes compliance and reduces weight of the housing of headstock by 5%. Topology optimization was done in the pre-processor Siemens Simcenter using the NX Nastran solver, which is based on the finite element method. The final structure of topology optimization was used as the concept for the basic layout of the main supporting ribs of the housing of the headstock. The obtained final design provides a high increase of the stiffness of the heavy machining centre in main directions.

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